云南某磷矿浮选精矿与尾矿的工艺矿物学研究
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摘要
通过矿样筛分分析、SEM-EDS分析和矿物定量解离系统(MLA)等测试手段对精矿、尾矿进行了工艺矿物学研究,研究表明:浮选精矿(一粗一精反浮选)中P2O5含量29.61%,氟磷灰石富集明显,但精矿中依然存在极少量氟磷灰石与白云石的连生体,且粒度较细,接触界线不平整,难与白云石解离,通过精矿进一步精选难以提高精矿的品质。浮选尾矿中P2O5含量6.91%,其中与白云石的连生体高达23.22%,要想进一步回收尾矿中的P2O5,需要对该尾矿进行再磨矿,使各矿物之间充分解离。
The process mineralogy study is carried out for concentrate and tailings by sieve analysis, SEM-EDS scanning electron microscope analysis and mineral liberation analysis system(MLA) and the other testing method. The study results show: The P205 content of flotation concentrate(one time roughing, one time selection reverse flotation) is 29.61%, the fluorapatite was obviously richer,but there also has small quantity of intergrowth of fluorapatite and dolomite in the concentrate, which has fine particle size, uneven contact boundary, which is difficult to separate with dolomite, and it is difficult to improve the quality of concentrate through further selection. P205 content in the flotation tailings is 6.91%, the dolomite intergrowth reach up to 23.22%, the tailings shall be reground for further recovery P205, and to make each mineral fully disintegrated.
The process mineralogy study is carried out for concentrate and tailings by sieve analysis, SEM-EDS scanning electron microscope analysis and mineral liberation analysis system(MLA) and the other testing method. The study results show: The P205 content of flotation concentrate(one time roughing, one time selection reverse flotation) is 29.61%, the fluorapatite was obviously richer,but there also has small quantity of intergrowth of fluorapatite and dolomite in the concentrate, which has fine particle size, uneven contact boundary, which is difficult to separate with dolomite, and it is difficult to improve the quality of concentrate through further selection. P205 content in the flotation tailings is 6.91%, the dolomite intergrowth reach up to 23.22%, the tailings shall be reground for further recovery P205, and to make each mineral fully disintegrated.
引文
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[3] Liu X,Zhang Y, Liu T, et al. Characterization and SeparationStudies of a Fine Sedimentary Phosphate Ore Slime[J]. Minerals,2017, 7(6):94.
[4]丁新悦.利用高浓度磷化氢制备四羟甲基硫酸鏻[D].昆明:昆明理工大学,2014.
[5] Kato C, Fujita K, Matsuda K. Effects of Various lons on the Syn-thesis of Strontium Phosphates Obtained by Homogeneous Precip-itation Method[J]. Journal of the Chemical Society of JapanChemistry&Industrial Chemistry, 2002(3):321-328.
[6] Zidi R, Babbou-Abdelmalek C, Chaabani F, et al. Enrichment oflow-grade phosphate coarse particles by froth-flotation process, atthe Kef-Eddur washing plant, Tunisia[J]. Arabian Journal ofGeosciences, 2016, 9(6):462.
[7] Prasad M. Reverse flotation of low grade sedimentary cherty-cal-careous rock phosphate ore-An overview[J]. Minerals&Metal-lurgical Processing, 2000, 17(1):49-55.
[8] Prasad M, Majmudar A K, Rao G M, et al. Flotation studies on alow-grade, cherty-calcareous rock phosphate ore from Jhabua, In-dia[J]. Minerals&Metallurgical Processing, 1995, 12(2):92-96.
[9] Wang L, Long Z, Huang X, et al. Recovery of rare earths fromwet-process phosphoric acid[J]. Hydrometallurgy, 2010, 101(1-2):41-47.
[10]张斌.大型湿法磷酸装置使用低品位磷矿的工艺技术[J].磷肥与复肥,2010,25(2):29-30.
[11]余莹,鄢笑非,周红,等.中低品位磷矿生产工业级磷酸二铵的工艺研究[J].武汉工程大学学报,2008,30(4):5-7.
[12]朱鹏程,苟苹,王国栋.磷石膏浮选脱硅回水对磷酸萃取的影响[J].磷肥与复肥,2016,31(12):30-32.
[13]龚亚丽.湿法磷酸中磷石膏的净化工艺研究[D].武汉:武汉工程大学, 2014.
[14]刘同海.湿法磷酸体系中二水硫酸钙结晶的过程研究[D].合肥:合肥工业大学,2016.
[15]张雯雯.磷酸中铁铝镁杂质对磷酸二铵(DAP)生产的影响[D].昆明:昆明理工大学,2014.
[16]晏明朗.湿法磷酸净化制磷酸盐技术的现状和发展概述[J].磷酸盐工业,2007(1):1-7.
[17]韩木贵.杂质对磷酸、磷铵生产的影响及控制措施[J].磷肥与复肥,2017,32(4):17-19.